Metaloterm MF twin wall insulated chimney

Contact us, or visit our showroom for price...

SKU: SKU18020
Manufacturer: Docherty

MF is a universal multi-fuel and multifunctional chimney suitable for internal and external applications. It can be used for high temperature applications, but also because of the integral silicone sealing ring, it can be applied to condensing and positive pressure installations. It is suitable for use at continuous operating temperatures of 450°C for negative pressure applications and 200°C for positive pressure applications.

  • Diameter range: 100mm, 130mm, 150mm, 180mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm and 600mm
  • Inner liner material: 0.4mm grade 316L stainless steel
  • Outer casing material: 0.5mm grade 304 stainless steel
  • Insulating material: 25mm mineral wool – 100mm to 400mm 37.5mm mineral wool – 450mm to 600mm
  • Joint method: Male spigot, female socket push fit and locking band
  • CE approved: Yes
  • Designation: BS EN 1856-1 T200 P1 W V2 L50040 O(10)

            BS EN 1856-1 T450 N1 D V3 L50050 G(50)
            BS EN 1856-1 T450 N1 W V2 L50050 O(40)
            BS EN 1856-2 T200 P1 W V2 L50050 O(10)
            BS EN 1856-2 T450 N1 D V3 L50050 G(70)
            BS EN 1856-2 T450 N1 W V2 L50050 O(40)

  • Maximum operating temperature: 450°C negative pressure 200°C positive pressure
  • Pressure capability: 200Pa at 200°C
  • Condensate resistance: Yes
  • Corrosion class: V2/V3
  • Soot fire resistance: See G and O classifications above (G – yes; O – no)
  • Minimum clearance to combustible material: 10mm to 70mm – subject to designation and application


Tamworth Fireplace, Unit 9 Sterling Park, Claymore, Tame Valley Industrial Estate, Tamworth, Staffordshire, B77 5DQ

For advice or to purchase call: 01827 250 779 or E-mail us:

Payments Accepted Here

The cookie settings on this website are adjusted to allow all cookies so that you have the very best experience. If you continue without changing your cookie settings, we'll assume that you are happy to receive all cookies on our website. However, if you would like to, you can change your settings by clicking the button below.